Abstract: The trial in peanut fields in Kaifeng city,Henan province and Qingdao city,Shandong province of China,showed that nematode isolations of Rhabditis(Oscheius) spp could control grub damage in peanut production.The effect rate was up to 96%,16% higher than that of chemical pesticide,50% phoxim solution.The rate of no damaged peanut legume had been kept up to 97% in the treatments of Rhabditis nematodes(91.2% in the contrast of phoxim solution,51.6% in the contrast of tap water).The yield in the nematode treatments was 242 kg/667m²,126 kg/667m² higher than that of in CK with tap water.The rate of increased yield was 90% in the nematode treatments,20%higher than that of in CK with phoxim solution.There was no significance difference between number 1^# and 2^# isolations of Rhabditis(Oscheius) spp to suppress the grub damage in peanut production fields.There was significant difference at 1% level between the nematode treatment and CK treatments,concerning the ratio of grub damage reduced down and peanut yield raised up.The data of this preliminary study indicated that some nematode species or isolations in the genus of Rhabditis(Oscheius) may have potential possibility to be considered as bio-control agents.

Key words: Rhabditis ( Oscheius) nematodes, Phoxim, Grub, Peanut field, Control effect

CLC Number: 

• S433.8+3